Improvement in machine for grinding mower and reaper-knives



l duird .gratte strut' (titille.

Letters Paten-t No. 95,033, dated September 21, 1869.

IMPROVEMENT IN MACHINE FOR GRINDING MOWER AND REAPER-KNIVES.

d The Schedule referred to in these Letters Patent and part of the same.

To allwhom it mtl/y concern 1 Be it knownthat I, HENRY MLLLARD, of York, in 'thecounty of Livingston, and State of New York, have invented anew and improved Sickle-Grinder; and I do hereby declare that the following is a full, clear, and exact description` thereof, which will Ienable others skilled in the art to make and use tl1esame,refereuce being had tothe accompanying drawing, forming part of this speciicatiom'in wl1ic11' Figure 1 is a detail `sectional'view of my improved machine, taken through the line :t x, iig. 2.

Figure 2 1s a top view of the same. Y

Similar letters of reference indicate corresponding parts. l v

YMy invention has forits object to furnish an improved` machine for grinding mowing and reaping-machine cutters, which shall be simple in construction, easily operated, and-so arranged that the cutters may be ground all the way from point to heel; and

It consists in the construction and combination of the variousparts. o'f the machine, as hereinafter more fully described. f

A is the frame 0f the machine, which is supported by the legs B, ofvsnch a length as to raise the machine to a convenient height. v C is the grindstone, the face of which is made angulanas shown in fig. 2 and which is securely attached to the shaft D, the journals of which revolve in bearings E, attached to the side bars of the frame A.

F is a small bevel-gear wheel, attached to the shaft l V D, into the teeth of which Vmesh the teeth of the bevelgear wheel G, attached to the innerend of the shaft H, which revolves in hearings attached to the frame A, and to the outer end of which is attached the crank I, by means -of which motion is given to the grindstone O.

rlhis arrangement brings the crank I into such a position that itmay be operated by the operator with one l1and,while lle holds' the sickle upon the stone with the other hand.

J is an arm, the lower end of which is secured to the end bar of the frame A by a screw-bolt, K, -passing through the said frame A and through aslot-in the said arm J, so that the sickle-holder maybe raised or lowered; to adjust it, as required. 'lhe upper end of the arm J is branched, as shown in iig. 2, and to and between the ends of the said branches is pivoted the roller L'.

M are two arms, the lower ends of whicharerigidly attached to or formed solidly upon the roller L, at or near its ends.

To the upper ends of the arms M is hinged the frame N, in the lower part of which the cutters are placed to 'be ground, and by means of which the said cutters are held down squarely upon the grindstone to be ground. The cutters are prevented from dropping out ofthe frame N, when the said frame is raised `from the machine, by the-arms O, one end of each of which is attached'to the front side bar of the frame N, so as to pass beneath and support the cutters. Thisconstruction allows the frame N to be rocked, so that any desired part of the cutter-edges may be held against the surface ofthe stone.

By this construction the adjacent edges of two ad- A 'jacent cutters are ground at the same time.

As the edges of. the-,cutters are ground, the cutterbaris. moved longitudinally in the iameN to bring the edges of the next cutter into proper position to kbe V Witnesses:

DANIEL L. SHULL, DANI-EL W..STEWART. 

